Experimental Ross Rifle?

[tiriaq]

H-dot-G-dot also appears on Canadian 1914 Home Guard rifles. It would be interesting to note if there is a HG srial on the left side of the barrel breech.
Had a better look at the photos. I do not believe that the receiver is adapted from a Mk. III Ross receiver; it was new made for this project. I cannot see a Ross receiver there.
The machinework on the receiver is well done, professional quality.
The lock is a slightly inclined sliding block, behind the bolt, working vertically. Looks to be non-ferrous. I believe the rifle is a delayed blowback prototype, using the Blish system. I know that there was experimentation using the Blish system with rifle calibers.
Ross barrel, front part of the stock, part of the butt, handguard and magazine, but that's about it. Its not really a converted Ross rifle, its a rifle made using some salvaged Ross parts.
Who did it? Darned if I know. If it is indeed a Blish experiment, I'd suggest the 1920s.